SE407758B - PROCEDURE FOR MICROBIOLOGICAL MODIFICATION OF LOVTERS BY THE IMPACT OF AEROBA MICRO-ORGANISMS - Google Patents

PROCEDURE FOR MICROBIOLOGICAL MODIFICATION OF LOVTERS BY THE IMPACT OF AEROBA MICRO-ORGANISMS

Info

Publication number
SE407758B
SE407758B SE7711089A SE7711089A SE407758B SE 407758 B SE407758 B SE 407758B SE 7711089 A SE7711089 A SE 7711089A SE 7711089 A SE7711089 A SE 7711089A SE 407758 B SE407758 B SE 407758B
Authority
SE
Sweden
Prior art keywords
wood
microorganism
content
hardwood
regulated
Prior art date
Application number
SE7711089A
Other languages
Swedish (sv)
Other versions
SE7711089L (en
Inventor
Sok
Original Assignee
Enfors Sven Olof
Lindberg Bertil
Molin Nils
Montelin Eugen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Enfors Sven Olof, Lindberg Bertil, Molin Nils, Montelin Eugen filed Critical Enfors Sven Olof
Priority to SE7711089A priority Critical patent/SE407758B/en
Priority to FI782976A priority patent/FI64531C/en
Priority to GB7935268A priority patent/GB2041402B/en
Priority to NO783354A priority patent/NO149577C/en
Priority to US05/948,275 priority patent/US4346175A/en
Priority to NL7815044A priority patent/NL7815044A/en
Priority to DE2857355A priority patent/DE2857355C2/en
Priority to DK437178A priority patent/DK147335C/en
Priority to CH337180A priority patent/CH646370A5/en
Priority to CA000312598A priority patent/CA1145696A/en
Priority to EP78850014A priority patent/EP0001540A1/en
Priority to BEBTR31A priority patent/BE31T1/en
Priority to JP12163078A priority patent/JPS5489079A/en
Priority to AT0716178A priority patent/AT367448B/en
Priority to IT28410/78A priority patent/IT1099762B/en
Publication of SE7711089L publication Critical patent/SE7711089L/en
Publication of SE407758B publication Critical patent/SE407758B/en
Priority to FR7921335A priority patent/FR2432921A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/002—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process employing compositions comprising microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/02—Staining or dyeing wood; Bleaching wood
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S435/00—Chemistry: molecular biology and microbiology
    • Y10S435/8215—Microorganisms
    • Y10S435/822—Microorganisms using bacteria or actinomycetales
    • Y10S435/832—Bacillus
    • Y10S435/838—Bacillus polymyxa
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S435/00—Chemistry: molecular biology and microbiology
    • Y10S435/8215—Microorganisms
    • Y10S435/911—Microorganisms using fungi

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Paper (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Mushroom Cultivation (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)

Description

f7111os9-8 a 2 och bortleda vattenånga, vilket gjort träprodukten användbar som utgångsmaterial för träformar i glastillverkningsindunstrin. f7111os9-8 a 2 and divert water vapor, which made the wood product useful as a starting material for wood molds in the glassmaking industry.

Förutom ovan angivna användningsområden har den reglerat svamp- angripna träprodukten (Mykoholz) flera andra tillämpningsomrâden, såsom vid möbeltillverkning och som brandskyddsmaterial efter im- pregnering. Produkten är sålunda mångsidigt användbar.In addition to the areas of use mentioned above, the regulated fungal-infested wood product (Mykoholz) has several other areas of application, such as in furniture manufacturing and as a fire protection material after impregnation. The product is thus versatile.

En nackdel hos den kända processen är att den är alltför tids- krävande, åtskilliga veckor, och därigenom olämplig för industriell exploatering i stor skala, samt begränsad till enbart svampar till- hörande vitrötsvamparna. _ Föreliggande uppfinning har som ändamål att åstadkomma ett industriellt anpassbart förfarande för snabb mikrobiologisk modi- fiering av lövträ för framställning av en mångsidigt användbar trä- produkt genom inverkan av mikroorganismer, varigenom nackdelarnahos den kända processen undanröjes.A disadvantage of the known process is that it is too time-consuming, several weeks, and thus unsuitable for large-scale industrial exploitation, and limited to only fungi belonging to the white root fungi. The object of the present invention is to provide an industrially adaptable process for rapid microbiological modification of hardwood for the production of a versatile wood product by the action of microorganisms, thereby eliminating the disadvantages of the known process.

Ett annat ändamål är att åstadkomma ett förfarande av det i ingressen till patentkravet l angivna slaget, vilket inte är be- gränsat till användningen av enbart svampar tillhörande vitröt- svamparna, utan vid vilket såväl svampar som bakterier och enzyma- tiskt aktiva preparationer därav likaväl kan användas. Ändamålen ovan uppnås genom det förfarande som har de i patent- kraven angivna kännetecknen.Another object is to provide a process of the kind set out in the preamble of claim 1, which is not limited to the use only of fungi belonging to the carrot fungi, but in which both fungi and bacteria and enzymatically active preparations thereof can equally well be used. The above objects are achieved by the process having the features set forth in the claims.

Enligt föreliggande uppfinning tillföres, såsom framgår av det ovanstående, ett lövträ, som skall underkastas mikrobiologisk modi- fiering, en för det använda lövträet speciellt vald mikroorganism som sådan eller som en enzymatiskt aktiv preparation därav i till- räcklig mängd i eller på ytan av träet för angrepp därpå, samtidigt som temperatur,relativ fukthalt, 02-halt och C02-halt noggrant reg- Ieras med hänsyn till den valda mikroorganismen eller enzymatiskt aktiva preparationen därav, så att önskad modifiering av lövträet åstadkommes. Den mikrobiologiska processen avbrytes därefter på lämpligt sätt. Ett sådant lämpligt sätt inbegriper behandling med ånga eller varmvatten, följt av torkning, eller enbart torkning.According to the present invention, as is apparent from the foregoing, a hardwood to be subjected to microbiological modification is added to a microorganism specially selected for the hardwood used as such or as an enzymatically active preparation thereof in a sufficient amount in or on the surface of the wood. for attack thereon, while temperature, relative moisture content, O 2 content and CO 2 content are carefully controlled with respect to the selected microorganism or enzymatically active preparation thereof, so that the desired modification of the hardwood is achieved. The microbiological process is then interrupted in an appropriate manner. Such a suitable method involves treatment with steam or hot water, followed by drying, or drying only.

Lövträet tillföres mikroorganismen företrädesvis genom ymp- ning-medenxsporpreparation, mycel, infekterat sågspån eller annat bärarmaterial,tillsatt_med mikroorganismen ellerdenenzymatiskt aktiva preparationen därav. * För att reducera mängden naturliga mikroorganismer, som kan leda till en oreglerad modifiering på träet,kan träet före ympningen behandlas, exempelvis genom sterilisering eller desinficering.The hardwood is supplied to the microorganism preferably by inoculation-spore preparation, mycelium, infected sawdust or other carrier material, added with the microorganism or the enzymatically active preparation thereof. * To reduce the amount of natural microorganisms, which can lead to an unregulated modification of the wood, the wood can be treated before inoculation, for example by sterilization or disinfection.

Träet kan förbehandlas med ånga och/eller tillväxtreglerande 7711089-8 ämnen för de valda mikroorganismerna. Träet kan även förbehandlas med enzymatiskt aktiva preparationerna. Som enzymatiskt aktiva pre- parationer väljes exempelvis pektinas och/eller cellulas.The wood can be pretreated with steam and / or growth-regulating substances for the selected microorganisms. The wood can also be pretreated with the enzymatically active preparations. For example, pectinase and / or cellulase are selected as enzymatically active preparations.

Enligt en föredragen utföringsform av uppfinningen väljes som lövträ bok, al eller björk, exempelvis i form av faner.According to a preferred embodiment of the invention, beech, alder or birch are chosen as hardwood, for example in the form of veneer.

Föredragna mikroorganismer är sådana som producerar ett färg- pigment som fixeras i trästrukturen, stimulerar utlösning av träets naturliga hartser och limämnen, eller som ger upphov till sura ämnesomsättnings- och nedbrytningsprodukter. Sistnämnda mikroorga- nismer åstadkommer olika surhetsgrader i olika partier Vilket ger olika färgintensiteter i olika partier av träet.Preferred microorganisms are those which produce a color pigment which is fixed in the wood structure, stimulates the release of the wood's natural resins and adhesives, or which gives rise to acidic metabolism and degradation products. The latter microorganisms produce different degrees of acidity in different parts, which gives different color intensities in different parts of the wood.

Enligt en ytterligare föredragen utföringsform av uppfinningen styres nedbrytningen på sådant sätt att mikrobiologiskt modifierade partier av träet varvas med obehandlade, exempelvis genom torkning eller tillförsel av gifter. Härigenom erhålles en dimensionsstabil produkt med partier av olika hårdhet.According to a further preferred embodiment of the invention, the degradation is controlled in such a way that microbiologically modified parts of the wood are alternated with untreated, for example by drying or adding poisons. This results in a dimensionally stable product with batches of different hardness.

I det följande ges en översikt över konkreta utföringsformer av uppfinningen med för den valda mikroorganismen specifika områden avseende temperatur, relativa fukthalt, 02-halt och C02-halt vid mikrobiologisk nedbrytning av lövträ.The following is an overview of concrete embodiments of the invention with areas specific for the selected microorganism in terms of temperature, relative moisture content, O 2 content and CO 2 content in microbiological degradation of hardwood.

Exempel lövträ mikroorganism temperatur relativ fukt- 02-halt C02-halt O nre " C halt, Z Z p Z 1 bok,björk, Armillaria, 15-40 30-90 ca 20-21 upp till 31 '. 11121128 _ " Ca 5 2 " Xylaria ' 13-40 _ 35-80 ca 20-21 upp till polymorfa 5 3 " Bacillus 20-35 80-100 upp till 5 POIYNYX-fl _ i 21 Genom förfarandet enligt uppfinningen erhålles ett mikrobiolo- giskt modifierat trä med hög porositet, varigenom lättare inträng- ning av substanser, som tillföres för att ge önskad färg och hårdhet, åstadkommes. Produkten kan även impregneras med t ex kiselsyraderi- vat som ger ökad eldhärdighet och förbättrade akustiska egenskaper hos träet.Examples hardwood microorganism temperature relative moisture content 02 content CO 2 content O nre "C content, ZZ p Z 1 beech, birch, Armillaria, 15-40 30-90 about 20-21 up to 31 '. 11121128 _" About 5 2 "Xylaria '13-40 _ 35-80 about 20-21 up to polymorphic 5 3" Bacillus 20-35 80-100 up to 5 POIYNYX- i _ i 21 By the process according to the invention a microbiologically modified wood with high porosity is obtained , whereby easier penetration of substances, which are added to give the desired color and hardness, is achieved. The product can also be impregnated with, for example, silicic acid derivatives which provide increased fire resistance and improved acoustic properties of the wood.

Förfarandet enligt uppfinningen medger en snabb och reglerad mikrobiologisk modifiering av lövträ, i motsats till de långsammaThe method according to the invention allows a rapid and controlled microbiological modification of hardwood, in contrast to the slow

Claims (14)

7711089-s_ och oreglerade förloppen i naturen, samt 1 förhållande till den kända tekniken en snabbare och industriellt anpassbar och ekonomisk modifiering_i stor skala. Z Vid tillämpning på lövträ i form av faner erhålles enligt upp- finningen en tekniskt mycket intressant produkt, som kan användas till fanerade produkten;Speciellt kan nämnas tillverkning av lådor 'för högtalare. PATENTKRAV7711089-s_ and unregulated processes in nature, as well as 1 relation to the prior art a faster and industrially adaptable and economical modification_ on a large scale. Z When applied to hardwood in the form of veneer, according to the invention a technically very interesting product is obtained, which can be used for the veneered product; special mention may be made of the manufacture of boxes for speakers. PATENT REQUIREMENTS 1. Förfarandé för mikrobiologisk modifiering av lövträ genom inverkan av mikroorganismer, k ä n n e t e c k n a t därav, att en för det använda lövträet speciellt vald.aerob mikroorganism som sådan eller en enzymatiskt aktiv preparation därav i tillräcklig mängd tillföres i eller på ytan av träet för angrepp därpå, att temperatur, fukthalt i träet, 02-halt och C02-halt regleras med hänsyn till den valda mikroorganismen eller enzymatiskt aktiva pre- parationen därav, varvid selektiv modifiering av lövträet åstadkommas, samt att processen avbrytes på lämpligt sätt.1. A method for microbiological modification of hardwood by the action of microorganisms, characterized in that an aerobic microorganism specially selected for the hardwood used as such or an enzymatically active preparation thereof is applied in sufficient quantity in or on the surface of the wood for attack thereon. , that temperature, moisture content in the wood, O 2 content and CO 2 content are regulated with regard to the selected microorganism or enzymatically active preparation thereof, whereby selective modification of the hardwood is effected, and that the process is interrupted in an appropriate manner. 2. Förfarande enligt kravet l, k ä_n n e t e c k n a t därav, att som mikroorganism väljas svampen Armillaria mellea och att temperaturen regleras till 20-40°C, relativa fukthalten i träet till 30-90 % samt 02-halten och C02-halten till ca 20-21 % respek- tive upp till ca S %.2. A method according to claim 1, characterized in that the fungus Armillaria mellea is selected as the microorganism and that the temperature is regulated to 20-40 ° C, the relative moisture content of the wood to 30-90% and the O 2 content and the CO 2 content to about 20 -21% or up to approx. S%. 3. Förfarande enligt kravet 1, k ä nln e t e c k n a t därav, att som mikroorganism väljes Xylaria polymorfa och att temperaturen regleras till l3~40°C, relativa fukthalten i träet till 35-80 % samt 02-halten och C02-halten till 20-21 % respektive upp till 5 %.3. A method according to claim 1, characterized in that Xylaria polymorph is selected as the microorganism and that the temperature is regulated to 13 ~ 40 ° C, the relative moisture content of the wood to 35-80% and the O 2 content and the CO 2 content to 20- 21% and up to 5% respectively. 4. Förfarande enligt kravet l, k ä n n e t e c k n a t därav, att som mikroorganism väljes Bacillus polymyxa och att temperaturen regleras till 20-35°C, relativa fukthalten i träet till 80-100 % samt 02-halten och C02-halten upp till 21 respektive 5 %.4. A method according to claim 1, characterized in that Bacillus polymyxa is selected as the microorganism and that the temperature is regulated to 20-35 ° C, the relative moisture content of the wood to 80-100% and the O 2 content and the CO 2 content up to 21 and 21, respectively. 5%. 5. Förfarande enligt kravet 1, k ä n n e t e c k n a t därav, att som enzymatiskt aktiv preparation väljes pectinas och/eller cellulas. IProcess according to Claim 1, characterized in that pectinase and / or cellulase are chosen as the enzymatically active preparation. IN 6. Förfarande enligt kravet 1, k ä n n e t e c k n a t därav, att träet förbehandlas_med ånga och/eller tillväxtämnen för mikro- organismen.6. A method according to claim 1, characterized in that the wood is pretreated with steam and / or growth substances for the microorganism. 7. Förfarande enligt kravet 1, k ä n n e t e c k n a t därav, 'att träet ympas med en sporpreparation, mycel, infekterat sågspån .. g i i 7711089-a eller annat bärarmateria1,tillsatt med mirkoorganism.7. A method according to claim 1, characterized in that the wood is grafted with a spore preparation, mycelium, infected sawdust .. i i 7711089-a or other carrier material1, added with microorganism. 8. Förfarande enligt kravet l, k ä n n e t e c k n a t därav, att processen avbrytes genom behandling med ånga eller varmvatten, följt av torkning,eller genom enbart torkning.A method according to claim 1, characterized in that the process is interrupted by treatment with steam or hot water, followed by drying, or by drying only. 9. Förfarande enligt kravet l, k ä n n e t e_c k n a t därav, *att lövträ 1 form av faner användes.9. A method according to claim 1, characterized in that hardwood in the form of veneer is used. 10. Förfarande enligt kravet l, k ä n n e t e c k n a t därav, att som lövträ våljes bok, al, björk. 710. A method according to claim 1, characterized in that beech, alder, birch are selected as hardwood. 7 11. ll. Förfarande enligt kravet l, k ä n n e t e c kin a t _därav, att som mikroorganism väljes en organism som producerar ett färgpig- ment som fixeras i trästrukturen. '11. ll. Method according to Claim 1, characterized in that an organism which produces a color pigment which is fixed in the wood structure is selected as the microorganism. ' 12. Förfarande enligt kravet l, k ä n n e t e c k n a t därav, att som mikroorganism väljes en organism som stimulerar utlösning av träets naturliga hartser och limämnen.12. A method according to claim 1, characterized in that an organism is selected as the microorganism which stimulates the release of the wood's natural resins and adhesives. 13. Förfarande enligt kravet 1, k ä n n e t e c k n a t därav, att nedbrytningen styres på sådant sätt att man erhåller mosaik av mikrobiologiskt modifierade och obehandlade partier.13. A method according to claim 1, characterized in that the degradation is controlled in such a way as to obtain mosaics of microbiologically modified and untreated portions. 14. Förfarande enligt kravet 1, k ä n n e t etc k n a t därav, att som mikroorganism väljes en organism som ger upphov till sura ämnesomsättnings- och nedbrytningsprodukter. ANFÖRDA PUBLIKATIONER: Sverige 89 770 (38 h:3), 89 771 (38 h:3) Frankrike 1 030 342 Storbritannien 1 090 403 (AO1n 5/00) Tyskland 164 892 (38 h:5/01), 206 99? (38 h:S/01), 359 S78 (38 h:5/02)14. A method according to claim 1, characterized in that an organism which gives rise to acidic metabolic and degradation products is selected as the microorganism. STATED PUBLICATIONS: Sweden 89 770 (38 h: 3), 89 771 (38 h: 3) France 1 030 342 Great Britain 1 090 403 (AO1n 5/00) Germany 164 892 (38 h: 5/01), 206 99? (38 h: S / 01), 359 S78 (38 h: 5/02)
SE7711089A 1977-10-04 1977-10-04 PROCEDURE FOR MICROBIOLOGICAL MODIFICATION OF LOVTERS BY THE IMPACT OF AEROBA MICRO-ORGANISMS SE407758B (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
SE7711089A SE407758B (en) 1977-10-04 1977-10-04 PROCEDURE FOR MICROBIOLOGICAL MODIFICATION OF LOVTERS BY THE IMPACT OF AEROBA MICRO-ORGANISMS
FI782976A FI64531C (en) 1977-10-04 1978-09-29 FOERFARANDE FOER MIKROBIOLOGISK MODIFIERING AV LOEVTRAE AV MICROORGANISMER
DK437178A DK147335C (en) 1977-10-04 1978-10-03 PROCEDURE FOR REGULATED MICROBIOLOGICAL MODIFICATION OF LEAVES WITH MICRO-ORGANISMS
CA000312598A CA1145696A (en) 1977-10-04 1978-10-03 Process for the microbiological modification of hardwood by the action of microorganisms
US05/948,275 US4346175A (en) 1977-10-04 1978-10-03 Process for the microbiological modification of hardwood by the action of microorganisms
NL7815044A NL7815044A (en) 1977-10-04 1978-10-03 METHOD FOR MICROBIOLOGICAL MODIFYING HARDWOOD USING MICROORGANISMS.
DE2857355A DE2857355C2 (en) 1977-10-04 1978-10-03 Process for the selective microbiological modification of hardwood through the action of aerobic microorganisms
GB7935268A GB2041402B (en) 1977-10-04 1978-10-03 Process for the micro-biological modification of hardwood by the action of microorganisms
CH337180A CH646370A5 (en) 1977-10-04 1978-10-03 METHOD FOR OBTAINING HARD POROSITY WOOD.
NO783354A NO149577C (en) 1977-10-04 1978-10-03 PROCEDURE FOR SELECTIVE MICROBIOLOGICAL MODIFICATION OF LEAFEN WOOD BY AFFECTING AEROBIC MICROORGANISMS
EP78850014A EP0001540A1 (en) 1977-10-04 1978-10-03 A process for the microbiological modification of hardwood by the action of microorganisms
BEBTR31A BE31T1 (en) 1977-10-04 1978-10-03 PROCESS FOR THE MICROBIOLOGICAL MODIFICATION OF HARDWOOD BY THE ACTION OF MICROORGANISMS
JP12163078A JPS5489079A (en) 1977-10-04 1978-10-04 Microbiologicaly modifying method of hard wood by action of microorganism
AT0716178A AT367448B (en) 1977-10-04 1978-10-04 METHOD FOR THE MICROBIOLOGICAL CHANGING OF PRESENT WOOD BY THE ACTION OF MICROORGANISMS
IT28410/78A IT1099762B (en) 1977-10-04 1978-10-04 PROCEDURE FOR MICROBIOLOGICAL MODIFICATION OF HARD WOOD BY ACTION OF MICROORGANISMS
FR7921335A FR2432921A1 (en) 1977-10-04 1979-08-23 PROCESS FOR THE MICROBIOLOGICAL MODIFICATION OF HARDWOOD BY THE ACTION OF MICROORGANISMS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7711089A SE407758B (en) 1977-10-04 1977-10-04 PROCEDURE FOR MICROBIOLOGICAL MODIFICATION OF LOVTERS BY THE IMPACT OF AEROBA MICRO-ORGANISMS

Publications (2)

Publication Number Publication Date
SE7711089L SE7711089L (en) 1979-04-05
SE407758B true SE407758B (en) 1979-04-23

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Application Number Title Priority Date Filing Date
SE7711089A SE407758B (en) 1977-10-04 1977-10-04 PROCEDURE FOR MICROBIOLOGICAL MODIFICATION OF LOVTERS BY THE IMPACT OF AEROBA MICRO-ORGANISMS

Country Status (16)

Country Link
US (1) US4346175A (en)
EP (1) EP0001540A1 (en)
JP (1) JPS5489079A (en)
AT (1) AT367448B (en)
BE (1) BE31T1 (en)
CA (1) CA1145696A (en)
CH (1) CH646370A5 (en)
DE (1) DE2857355C2 (en)
DK (1) DK147335C (en)
FI (1) FI64531C (en)
FR (1) FR2432921A1 (en)
GB (1) GB2041402B (en)
IT (1) IT1099762B (en)
NL (1) NL7815044A (en)
NO (1) NO149577C (en)
SE (1) SE407758B (en)

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DE19652951A1 (en) 1996-12-19 1998-06-25 Univ Dresden Tech Process for the preservative storage of fresh logs
WO1999015321A1 (en) * 1997-09-19 1999-04-01 Lignocell Holz-Biotechnologie Gesellschaft Mbh Process for improving the impregnability of wood by pretreatment with fungi
EP1020264A1 (en) * 1998-12-31 2000-07-19 N.V.Ets Robert Stiernon S.A. Enzymatic composition and process for drying of wood
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CA1145696A (en) 1983-05-03
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DK147335B (en) 1984-06-25
FR2432921A1 (en) 1980-03-07
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NL7815044A (en) 1980-01-31
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DK437178A (en) 1979-04-05
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